摘要
墩墙混凝土温度裂缝带有普遍性,在墩墙根部浇筑一层延性超缓凝混凝土过渡层,能够减轻底板对墩墙早期外约束,减少温度应力,降低开裂风险。南通海港引河南闸站工程应用表明,拉应变可以降低83~135με,闸墩、站墩、出水池导流墩开裂面积降低47%~87%,并将有害裂缝转变为无害裂缝。
The temperature crack of pier wall concrete is universal.Pouring a layer of ductile super retarding concrete transition layer at the root of pier wall can reduce the early external constraint of bottom plate on pier wall,reduce temperature stress and the risk of cracking.The application of Nantong Harbor South Gate Station project shows that the tensile strain can be reduced by 83~135με.The cracking area of gate pier,station pier and diversion pier of outlet tank is reduced by 47%~87%,and the harmful cracks are transformed into harmless cracks.
作者
朱炳喜
王琰
姜西坤
胡明凯
居强
朱维
ZHU Bingxi;WANG Yan;JIANG Xikun;HU Mingkai;JU Qiang;ZHU Wei(Jiangsu Water Conservancy Science Research Institute,Yangzhou 225002,China;Jiangsu Hydraulic Engineering Construction Co.,Ltd.,Yangzhou 225002,China;Nantong Tongyuan Construction Supervision Co.,Ltd.,Nantong 226006,China)
出处
《江苏水利》
2022年第7期1-5,共5页
Jiangsu Water Resources
基金
江苏省科技厅创新能力建设计划(BM2018028)。
关键词
墩墙
延性超缓凝混凝土
温度裂缝
外约束
应用
pier wall
ductile super-retarding concrete
temperature crack
external restraint
application
